*{
    padding: 0;
    margin: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
body{
    margin: 10% auto;
    height: 100%;
}
.wn{
    display: table;
    margin: auto;
}

#a{
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: none;
    background: red;
    text-align: center;
    display: block;
    margin: auto;
}
#d{
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: none;
    background: darkgray;
    text-align: center;
    display: inline-block;
    margin-right: 30px;
}
#c{
    display: inline-block;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: none;
    background: fuchsia;
    text-align: center;
}

.nn1 input{
    width: 20px;
    height: 20px;
    background: red;
}
.nn2 input{
    width: 20px;
    height: 20px;
    background: darkgray;
}
.nn3 input{
    width: 20px;
    height: 20px;
    background: fuchsia;
}
.nn{
    display: flex;
    flex-direction: row;
}
.nn1,.nn2,.nn3{
    margin-right: 5px;
}